Barf Man is a black-skinned Lycra person. He appeared in Filthy Compilation #2 where he emerged from Frank's closet and regurgitated a yellow liquid, most likely eggs. In 30 WAYS TO USE THE TOILET, it is shown that Barf Man is a master of creatively taking a shit. He is also a superb rapper, as shown in Who's The Sucker (MUSIC VIDEO). In the same video, it is stated that he pukes when he drinks vegetable and fruit juice. It appears that he is close friends with Safari Man.
Barf man is also seemingly criminal. In 30 WAYS TO USE THE TOILET, he is shown killing his unnamed child, killing black people for simply being black, assaulting and murdering someone in the bathroom stalls and even raping a man-child.
Barf man is most likely Chin-Chin before he was cursed with Dark Chromosomes. Perhaps he's vomiting after the horrifying sexual abuse by Prometheus as seen in "Ninja Gets His ASS KICKED". This means that Comp #2 is set in the dark lords college years. The problem with this theory is that in the Book of Chromosomes, it is revealed that in the beginning of time, Chin Chin had his eyes sewn shut by the gods, and most likely meant that Chin Chin was born only seconds before.
Pink Guy Theory
It is possible that Barf Man is Pink Guy before being coated in pink paint as seen in the music video for Pink Season: The Prophecy. This contradicts the Chin-Chin theory as Chin-Chin cannot talk in english and Barf Man is seen rapping in english in Who's The Sucker (MUSIC VIDEO).